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Major source of prebiotic organics for two candidate early atmospheres (after 8)
| Source | Highly reducing atmosphere, g⋅yr−1 | Intermediate atmosphere, g⋅yr−1 |
|---|---|---|
| UV photolysis | 1 × 1015 | 3 × 1011 |
| Electric discharges | 3 × 1012 | 3 × 1010 |
| Shocks from large impacts | 2 × 1013 | 4 × 105 |
| Shocks from meteors | 4 × 1012 | 8 × 104 |
| Totals | ≈1 × 1015 | ≈5 × 1011 |
